I bought the this computer because I needed something light that I could carry around and I didn't need much processing power, HD space or RAM. In that sense the computer is perfect and outruns its competitors.
Now when I think about a computer without much processing capabilities I mean running heavy simulations and multitasking heavily. However after several month using the computer I'm surprised that computer can't handle even the most basic stuff. For example it gets really slow when watching online movies, videos on youtube or while using Skype for a video conference!! Those are basic processes I expect any computer to be able to handle, however the Macbook Air can't handle it. It overheats severely when using these applications and even freezes. If you are like me and like using more than 4 application at the same time (say Word, Excel, Messenger and Safari) this computer will give you a headache, it can't handle it, once again it overheat and runs very slowly.
In conclusion I would say that it is not worth buying, it is way to expensive and it will give you more trouble and headaches than satisfactions.